Furnace construction



Nov. 10, 1931. H. 1. ASH ET .AL 1,830,821

FURNACE CONSTRUCTION Filed March 31, 1930 Hora 1. disk \MiZZa C- dish.

5 Wm, \4 WWW m Patented Nov. 10, v1931 UNITED STATES PATENT OFFIICEHORACE I. ASH AND MILLARD C. ASE OI ALTON, ILLINOIS? ASSIGNOBS TOSTANDARD OILOOMPANY, (INDIANA), OF CHICAGO, ILLINOIS, A CORPORATION OFINDIANA FURNACE ooNsrnuc'rIoN Application filed larch 81, 1980. SerialNo. 440,420.

This invention relates to furnace design and it refers more particularlyto the wall structure of pipe still furnaces used in petroleumrefineries.

The object of our invention is to provide strength will not be. impairedat high temperatures. 1

This problem has heretofore been met by the use of curved front and sidewalls which were undesirable because of their ex ense, difficulty ofdesign, difiiculty of instal ation and their ap arance. We propose tosolve the problem y using a tapered outside wall of common brick, thetaper being from the bottom to'the top on the inside, reinforced byiairs of I-beams which are mounted and coo ed in the manner hereinafterdescribed. Referring to the drawings wherein like parts are designatedby similar reference characters throughout the several views, Figure Iis a perspective of our improved furnace with one corner broken away.

Figure 2 is a vertical section taken along the lines 2-2 of Figures 1and 3.

Figure 3 is a horizontal section taken along the lines 3-3 of Figure 2.

The furnace maybe briefly described as a rectangular structure having afront wallv 10, side walls 11, and top 12. The front wall is providedwith an aperture 12 and a casing 13 for admitting and mounting a gas orliquid fuel burner. The front and side walls are through which theoperator may inspect the tubes in the furnace. Corners and edges of thestructure may be protected by suitable angle iron strips 14. The roof issustained from I-beam's 15 in the conventional manner.

Referring more particularly to Figure 2, it will be seen that the sidewalls of our structure are of common brick 16 or equivalent material,and are tapered from the bottom to the top, a wall feet high being aboutalso provided with windows 13A- 2 feet thick at the bottom and 1 feetthick at-the top.

The entire surface of the furnace is lined with refractory material 17the side walls of the furnace bein preferably faced with a uniform layerof %re brick about 9 in thickness.

To reinforce the front and side walls, we provide I-beams 18 and 19 onthe outer and inner sides res ectively of the brick wall and clam 20 helto ether by bolts 21 for holding t e I-beams finely in position. Therefractory fire brick facing protects the inner I-beam as shown inFigures 2 and 3.

Since the walls of a pipe still furnace are heated to high temperatures,means must be provided to cool inner beam 19. We have accomplished thiscooling by providing an opening 22 adjacent the bottom of the Wall byleaving a space 23 on both sides of inner I-beam, and by roviding anopening 24 at the upper end 0 the I-beam.

' We have found that the tapered outer wall in combination with thecooled reinforcing means above described effectively prevents warpingand protects the furnace walls against undue expansion forces. The spacearound the inner I-beam acts as a chimney and causes a circulation ofair which'prevents the inner beam 19 from reaching dangerously hightemperatures.

While we-have described a preferred embodiment of our invention it isunderstood that we do not limit ourselves to the details therein setforth except as defined by the following claims.

We claim:

1. In furnace structure, a tapered wall, steel beams mounted in pairs onthe outside and inside of said wall, clamps for holding said beamsagainst said wall forreinforci'ng thesame, a refractory liningprotecting the inside of the wall and the inside beam, and means forcirculating-a cooling fluid in heat exchange relation to said innerbeam.

2. In furnace structure, a non-refractory wall tapered from the bottomto the top, a refractory lining on the inner side of said wall, areenforcing beam imbedded in said wall and means for circulating acooling fluid throu h said beam.

3. furnace structure, a non-refractory 4 wall, a steel beam on theoutside of said wall and another steel beam on the inside of-said wall,means for securing said outside beamto said insidebeam whereby said wallis reenforced, a refractory lining for protecting the inner side of thewall and the inside beam, and means for cooling said inside beam.

Signed this 24th day of March, 1930 at Wood River, county of Madison,State of Illinois.

HORACE I. ASH. MILLARD O. ASH.

